POST RETIREMENT BENEFIT PLANS - Components of Net Periodic Pension Cost (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Apr. 30, 2022	Apr. 30, 2021
Retirement Benefits [Abstract]
Service cost	$ 3.0	$ 3.1	$ 6.0	$ 6.2
Interest cost	5.1	4.6	10.2	9.1
Expected return on plan assets	(8.3)	(8.1)	(16.5)	(16.0)
Amortization of prior service cost	(0.1)	(0.1)	(0.2)	(0.1)
Recognized net actuarial loss	2.0	3.7	4.0	7.5
Net periodic pension cost	$ 1.7	$ 3.2	$ 3.5	$ 6.7